Patent US3118964A successfully refreshed from Google Patents.
US3118964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope objective
Assignee: Bausch and Lomb Inc
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Filing: 1962-04-26
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Granted: 1964-01-21
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Expires: 1982-04-26
Abstract
No abstract record available.
Inventors
- 👤 Michael J Buzawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:51
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
209 words
AN OPTICAL SYSTEM FOR A DRY TYPE OF MICROSCOPE OBJECTIVE HAVING A MAGNIFICATION OF 75 X, A NUMERICAL APERTURE OF 0.95 AND A FLAT FIELD, SAID SYSTEM BEING WELL CORRECTED FOR CHROMATIC AND MONOCHROMATIC IMAGE ABERRATIONS AND FURTHER HAVING A PERFORMANCE WHICH IS DIFFRACTION LIMITED, SAID SYSTEM COMPRISING A SUCCESSION OF OPTICALLY ALIGNED LENS MEMBERS WHICH ARE A FIRST, SECOND, THIRD AND FOURTH MENISCUS LENS MEMBER, ALL OF WHICH ARE AIR SPACED FROM EACH OTHER AND ARE CONCAVE TOWARD THE OBJECT SAID OF THE SYSTEM, THE FIRST AND THIRD MEMBERS BEING OF COMPOUND CONSTRUCTION WITH THEIR REFRACTIVE INTERFACES BEING CONCAVE TOWARD THE OBJECT SIDE, A COMPOUND FIFTH LENS MEMBER AIR SPACED REARWARDLY OF SAID FOURTH MEMBER AND COMPRISING A FRONT MENISCUS ELEMENT WHICH IS CONVEX TOWARD THE OBJECT SIDE AND A REAR DOUBLE CONVEX ELEMENT, THE ABOVE-RECITED LENS MEMBERS COMPRISING A FRONT LENS GROUP AND A COMPOUND SIXTH LENS MEMBER AIR SPACED REARWARDLY FROM SAID FRONT LENS GROUP AND COMPRISING A FRONT DOUBLE CONVEX ELEMENT AND A REAR DOUBLE CONCAVE ELEMENT, THE FOCAL LENGTHS F1 TO F6 OF SUCESSIVE LENS MEMBERS I TO VI BEING GIVEN IN TERMS OF THE EQUIVALENT FOCUS F OF SAID SYSTEM IN ORDER FROM FRONT TO REAR IN THE TABLE OF MATHEMATICAL EXPRESSIONS HEREBELOW:
Claim 2
Dependent Claim
209 words
AN OPTICAL SYSTEM FOR A DRY TYPE OF MICROSCOPE OBJECTIVE HAVING A MAGNIFICATION OF 75 X, A NUMERICAL APERTURE OF 0.95 AND A FLAT FIELD, SAID SYSTEM BEING WELL CORRECTED FOR CHROMATIC AND MONOCHROMATIC IMAGE ABERRATIONS AND FURTHER HAVING A PERFORMANCE WHICH IS DIFFRACTION LIMITED, SAID SYSTEM COMPRISING A SUCCESSION OF OPTICALLY ALIGNED LENS MEMBERS WHICH ARE A FIRST, SECOND, THIRD AND FOURTH MENISCUS LENS MEMBER, ALL OF WHICH ARE AIR SPACED FROM EACH OTHER AND ARE CONCAVE TOWARD THE OBJECT SAID OF THE SYSTEM, THE FIRST AND THIRD MEMBERS BEING OF COMPOUND CONSTRUCTION WITH THEIR REFRACTIVE INTERFACES BEING CONCAVE TOWARD THE OBJECT SIDE, A COMPOUND FIFTH LENS MEMBER AIR SPACED REARWARDLY OF SAID FOURTH MEMBER AND COMPRISING A FRONT MENISCUS ELEMENT WHICH IS CONVEX TOWARD THE OBJECT SIDE AND A REAR DOUBLE CONVEX ELEMENT, THE ABOVE-RECITED LENS MEMBERS COMPRISING A FRONT LENS GROUP AND A COMPOUND SIXTH LENS MEMBER AIR SPACED REARWARDLY FROM SAID FRONT LENS GROUP AND COMPRISING A FRONT DOUBLE CONVEX ELEMENT AND A REAR DOUBLE CONCAVE ELEMENT, THE FOCAL LENGTHS F1 TO F6 OF SUCESSIVE LENS MEMBERS I TO VI BEING GIVEN IN TERMS OF THE EQUIVALENT FOCUS F OF SAID SYSTEM IN ORDER FROM FRONT TO REAR IN THE TABLE OF MATHEMATICAL EXPRESSIONS HEREBELOW:
Claim 3
Dependent Claim
12 words
0F< F1< 6.5F 11.8F< F2<12.8F 7.5F< F3<8.0F 9.5F< F4<10.5F 11.3F< F5<12.3F 17.0F<-F6<20.0F
Claim 4
Dependent Claim
12 words
0F< F1< 6.5F 11.8F< F2<12.8F 7.5F< F3<8.0F 9.5F< F4<10.5F 11.3F< F5<12.3F 17.0F<-F6<20.0F
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-20 | 1967-07-22 | 1968-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-20 | 1971-07-22 | 1972-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-20 | 1975-07-22 | 1976-01-21 | $7700.00 | Window Closed / Lapsed |